Color television tube having shadow mask support studs unequally spaced from screen

ABSTRACT

The color television receiving tube of the present invention comprises a rectangular cylindrical panel having an outwardly curved rectangular face plate and two longer side plates and two shorter side plates so fitted to the periphery of the face plate as to project toward the funnel-shaped portion with the free flat edges of said side plates disposed in the same plane; a mask including a rectangular cylindrical frame member received in the cylindrical panel and formed of two longer side plates and two shorter side plates, of which at least said longer sides are outwardly curved at the top toward the face plate and a perforated member provided with numerous electron beam apertures and fixed to the cylindrical frame member at a prescribed space from the inner surface of the face plate; a plurality of support pins fixed in the inner wall of at least three of the adjacent projecting side plates of the cylindrical panel; and a plurality of elastic support members elastically fitted to the side plates of the cylindrical frame member facing the corresponding support pins so as to be detachably engaged with said support pins, thereby maintaining the perforated member at a prescribed spacing from the inner wall of the face plate, wherein the support pins are positioned nearer to the free flat edges of the side plates of the cylindrical panel arranged in the same plane as compared with those edges of the side plates of the frame member which face said free flat edges, and the support pins embedded in the longer side plates of the cylindrical panel are more spaced from the plane defined by the free flat edges of all the side plates of the cylindrical panel than the pins fitted to the shorter side plates of said panel.

United States Patent Imamura et al.

[ May2, 1972 [54] COLOR TELEVISION TUBE HAVING SHADOW MASK SUPPORT STUDS UNEQUALLY SPACED FROM SCREEN [72] inventors: Hitoshl Imamura, Kanagawa-kem Keijl Katakura, Tokyo, both of Japan Tokyo Shibaura Electrlc Co., Ltd., Kawasaki-shi, Japan [22] Filed: Dec. 8, 1970 [21] AppLNo; 96,116

[73] Assignee:

Primary ExaminerRobert Segal Ar!orneyFlynn & Frishauf [57] ABSTRACT The color television receiving tube of the present invention comprises a rectangular cylindrical panel having an outwardly curved rectangular face plate and two longer side plates and two shorter side plates so fitted to the periphery of the face plate as to project toward the funnel-shaped portion with the free flat edges of said side plates disposed in the same plane; a mask including a rectangular cylindrical frame member received in the cylindrical panel and formed of two longer side plates and two shorter side plates, of which at leastsaid longer sides are outwardly curved at the top toward the face plate and a perforated member provided with numerous electron beam apertures and fixed to the cylindrical frame member at a prescribed space from the inner surface of the face plate; a plurality of support pins fixed in the inner wall of at least three of the adjacent projecting side plates of the cylindrical panel; and a plurality of elastic support members elastically fitted to the side plates of the cylindrical frame member facing the corresponding support pins so as to be detachably engaged with said support pins, thereby maintaining the perforated member at a prescribed spacing from the inner wall of the face plate, wherein the support pins are positioned nearer to the free flat edges of the side plates of the cylindrical panel arranged in the same plane as compared with those edges of the side plates of the frame member which face said free flat edges, and the support pins embedded in the longer side plates of the cylindrical panel are more spaced from the plane defined by the free flat edges of all the side plates of the cylindrical panel than the pins fitted to the shorter side plates of said panel.

6 Claims, 9 Drawing Figures Patented May 2, 1972 2 Sheets-Sheet 1 FIG. 2

FIG. 4

FIG. 3

Patented May 2, 1972 3,660,709

= 2 Shun-Shut a COLOR TELEVISION TUBE HAVING SHADOW MASK SUPPORT S'I'UDS UNEQUALLY SPACED FROM SCREEN BACKGROUND OF THE INVENTION The present invention relates to a color television receiving tube and more particularly to improvements in the panel section.

In a color television receiving tube, for example, of the shadow mask type, its envelope consists of a panel and a funnel-shaped portion (hereinafter referred to as a funnel) jointed therewith. The panel is formed into a rectangular cylindrical shape. On one side of the panel is formed an outwardly curved rectangular face plate, and on the other side there are fitted to the periphery of the face plate two longer side plates and two shorter side plates, all of which project inwardly toward the funnel so as to be joined with its opening. The free flat edges of all the side plates of the cylindrical panel are displaced in the same plane.

In the rectangular cylindrical panel, there is detachably fitted a shadow mask coaxially with the face plate at a prescribed space q from its inner wall. The shadow mask assumes, like the face plate, a outwardly curved rectangular cylindrical form, and includes a perforated member wherein there are bored along the curved plane numerous apertures to allow the passage of electron beams emitted from an electron gun member received in the neck portion of the funnel, said perforated member being maintained at the aforesaid prescribed space q from the inner wall of the face plate. On said inner wall is formed a fluorescent layer consisting of three kinds of fluorescent materials giving forth light beams of different colors. The aforesaid space q which constitutes one of the most important factors in evaluating the quality of a color receiving tube, should always be kept constant. When the inner wall of the face plate is coated with the fluorescent layer, the shadow mask is repeatedly fitted to and detached from the panel, and incorporated therein when there is finally assembled a color television receiving tube. To enable said receiving tube to reproduce a good picture, it is necessary that the fluorescent layer, that is, the three different fluorescent materials be accurately positioned and electron beams be properly impinged on the fluorescent layer. Accordingly, the repeated fitting of the shadow mask to the face plate in preparing the fluorescent layer and its final incorporation in the panel should always be conducted at the same space q. Further, the shadow mask is subject to thermal and mechanical shocks during the fabrication of a color television receiving tube, so that the shadow mask should not only be fitted to and detached from the panel and finally incorporated therein in accurate alignment and with great ease, but also be of suffciently strong construction to withstand such thermal and mechanical shocks. Since the perforated member generally consists of a steel sheet as thin as 0.15 mm provided with numerous electron beam apertures and consequently readily tends to be deformed, it is reinforced with a rectangular cylindrical frame member. This frame member generally assumes an L-shaped cross section, the side portions of said frame member consisting of two outwardly curved longer side plates and two shorter side plates. The perforated member is fixed to the outside of the cylindrical frame member so as to close up its opening facing the face plate. The shadow mask is protected from its deformation generally resulting from heat by elastic support strips elastically fitted to the outside of the longer and shorter side plates of the cylindrical frame member by the aid of a temperature compensation strip. The support pins embedded in the inner walls of the longer and shorter side plates of the face plate are detachably fitted into the holes bored in the free ends of the elastic support strips, thereby fixing the shadow mask in place in the cylindrical panel. This is the arrangement of a panel included in a color television receiving tube according to the prior art.

However, there arise the following drawbacks from the facts that the support pins are positioned at the same space from the free fiat edges of the longer and shorter side plates of the Lil cylindrical panel projecting inwardly from the inner wall of the face plate, and that the point at which the elastic support strips provided on the shorter side plates of the cylindrical frame member engage the corresponding support pins closely faces the outside of said shorter side plates. Namely, there occur difficulties in fitting a temperature compensation member, effecting the compensation of the thermal deformation of the shadow mask, using elastic support members of the same shape and size, broadening the width of the outer portion of the cylindrical frame member for its reinforcement and allowing the shadow mask to be fitted to and detached from the cylindrical panel and finally incorporated therein. All these drawbacks will be further discussed by reference to the appended drawings.

The object of the present invention is to provide a color television receiving tube, particularly a panel which permits a mask to be fitted to and detached from said panel and finally incorporated therein in accurate alignment and with great case, while always maintaining a prescribed space between the inner wall of a face plate and a perforated member bored with electron beam apertures.

SUMMARY OF THE INVENTION A color television receiving tube according to the present invention comprises a rectangular cylindrical panel having a rectangular outwardly curved face plate, two longer side plates and two shorter side plates inwardly projecting from the periphery of the face plate to be joined with the opening of a funnel with the free flat edges of all said side plates disposed in the same plane, and a fluorescent layer coated on the inner wall of the face plate; a mask formed of a rectangular cylindrical frame member received in the cylindrical panel including two longer side plates and two shorter side plates, of which at least the longer side plates are outwardly curved at the top toward the face plate, and a perforated member bearing numerous electron beam apertures which is fixed to the cylindrical frame member so as to close up its opening at a prescribed space from the inner wall of the face plate; a plurality of support pins embedded in the inner walls of at least three of the adjacent inwardly projecting side plates of the cylindrical panel with the engaging end of the support pin exposed to the interior of the panel; and a plurality of elastic support members elastically fitted to the side plates of the cylindrical frame member facing the corresponding support pins so as to be detachably engaged with said support pins, thereby maintaining the perforated member at said prescribed space from the inner wall of the face plate, wherein the support pins are positioned nearer to the free flat edges of the side plates of the cylindrical panel arranged in the same plane as compared with those edges of the frame member which face said free flat edges, and the support pins embedded in the longer side plates of the cylindrical panel are more spaced from the plane defined by the free flat edges of all the side plates of the cylindrical panel than the pins fitted to the shorter side plates of said panel.

BRIEF EXPLANATION OF THE DRAWINGS FIG. 1 is a plan view, as viewed in the direction of the ar' rows of FIG. 2, of a cylindrical panel into which there is fitted a shadow mask before the final assembly of a color television receiving tube according to the present invention;

FIG. 2 is a sectional view on line II-II of FIG. 1 as viewed in the direction of the arrows;

FIG. 3 is an enlarged view of section A of FIG. 2;

FIG. 4 is a side view in the direction of the arrow of FIG. 3 where the cylindrical panel is removed;

FIG. 5 is a sectional view of the prior art cylindrical panel corresponding to FIG. 2;

FIG. 6 is a sectional view of a cylindrical panel according to another embodiment of the present invention corresponding to FIG. 2; and

FIGS. 7 to 9 are plan views from the funnel side of a cylindrical panel according to still another embodiment of the invention into which there is fitted a shadow mask before the final assembly of a color television receiving tube.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Throughout FIGS. 1 and 2, numeral 10 denotes a rectangular cylindrical panel and numeral 11 an outwardly curved face plate on which there is reproduced an image. From the periphery of the face plate 11 project two longer side plates 12 and two shorter side plates 13 inwardly, that is, toward the funnel so as to be joined with its opening. The free edges of the projecting side plates are finished flat so as to be disposed in the same plane. The inner wall of the face plate 11 is coated with a fluorescent layer comprising three kinds of fluorescent materials giving forth light beams of different colors, the particles of said fluorescent materials being regularly arranged in dotted form. There is provided coaxially with the face plate 11 at a prescribed space q from its inner wall a perforated member 14 prepared by boring, for example, a rectangular outwardly curved thin steel sheet with numerous electron beam apertures. The side portions of a rectangular cylindrical frame member 15 which are substantially parallel with the cylindrical axis comprise two outwardly curved longer side plates 16 and shorter side plates 17. To one side of the frame member 15 is fixed the perforated member 14 so as to close up that opening of said frame member 15 which faces the inner wall of the face plate 11. To the outside of the longer and shorter side plates 16 and 17 are elastically fittted elastic support strips 19 through temperature compensation strips 18 made of, for example, bimetallic material. As illustrated in FIGS. 3 and 4, the temperature compensation strip 18 is spot welded to the outside of the shorter side plates 17 of the frame member 15 at points 20. To the free end of the temperature compensation strip 18 is elastically spot welded the elastic support strip 19 at points 22. The free end of the elastic support strip 19 is perforated with an engaging hole 23 which engages the later described support pin 24 so as to allow the shadow mask to be fitted to and detached from the cylindrical panel in accurate alignment and with great ease. That part of the support pin 24 which detachably engages the engaging hole 23 is exposed to the interior of the cylindrical panel 10, the remaining portion being embedded in the side plate projecting from the periphery of the face plate inwardly, that is, toward the funnel. The support pin 24 is provided on all the side plates as shown in FIG. 1, at a point nearer to the free flat edge 25 thereof as compared with that edge of each side plate of the cylindrical frame member 15 which faces said pin 24. The vertical distance P between the support pin 24 and that edge of each side plate of the cylindrical frame member 15 which faces said pin 24 is the same with respect to all said pins 24. (The term vertical distance P," as used herein, is defined to mean the distance from that edge of each side plate of the cylindrical frame member 15 which faces the pin 24 to the intersection of the extended vertical plane of said edge and the extended horizontal plane of said pin 24.) Namely, as shown in FIG. 2, for example, the support pins 24 provided substantially at the center of the longer side plates 12 of the cylindrical panel 10 are equally drawn nearer to the free flat edges of said side plates 12 as compared with those edges 26 of the longer side plates of the cylindrical frame member 15 which face said pins 24. This is also the case with the pins 24 embedded in the shorter side plates of the cylindrical panel 10. Under the aforementioned construction, the pins 24 disposed in the longer side plates of the cylindrical panel 10 are more spaced from the horizontal plane defined by the free flat edges 25 of all the side plates of the cylindrical panel 10 than the pins 24 fitted to the shorter side plates thereof, because the panel 10 itself has an outwardly curved front surface.

The shadow mask comprising the cylindrical frame member 15 and perforated member 14 is repeatedly fitted to and detached from the cylindrical panel 10 when the inner wall of the face plate 11 is coated with a fluorescent layer. After the formation of the fluorescent layer is finished the shadow mask is incorporated in a receiving tube in the form indicated in FIG. 2 by joining the free flat edges of the side plates of the cylindrical panel 10 to the opening of the funnel using, for example, adhesive material. The shadow mask is fixed in place by flexing the elastic support strips 19 against the elastic pressure toward the cylindrical frame member 15 and fitting the support pins 24 into the engaging holes 23. The removal of the shadow mask is effected similarly by flexing the elastic support strips 19 toward the cylindrical frame member 15, thereby disengaging the support pins 24 from the engaging holes 23. It will be apparent from the description of the foregoing embodiment that since the support pins 24 are positioned nearer to the free edges 25 of the side plates of the cylindrical panel 10 as compared with the inner edges (indicated, for example, by 26 in FIG. 2) of the cylindrical frame member 15, the shadow mask can be fitted to and detached from said panel 10 in accurate alignment and with great ease. Easy fitting and detachment of the shadow mask prominently reduces the occurrence of undesirable events such as the touch of the shadow mask with the fluorescent layer and in consequence the fall of said fluorescent layer and the deformation of the shadow mask which have often been observed in the conventional receiving tube. Further, according to the present invention, all the side plates of the cylindrical frame member 15 included in the shadow mask are supported by elastic support member 19 of the same shape and size, eliminating the troublesome work of preparing elastic support members 19 whose shape and size vary with the longer and shorter side plates of the cylindrical frame and also offering the convenience of using the same welder in fixing said elastic support strips 19. A further advantage of the invention is that the vertical distance indicated by the arrows of FIG. 4 between points 22 at which the elastic support strips 19 are fixed to the temperature compensation strip 18 and points 20 at which said temperature compensation strip 18 is fixed to the cylindrical frame member 15 is made equal for all the side plates of the cylindrical frame member 15, thereby uniformly distributing the deformation of the shadow mask over its entirety. This prominently facilitates the proper impingement of electron beams on the fluorescent plane so that color purity control becomes easy.

The aforementioned embodiment relates to the case where the shadow mask was fitted with additional attachment of the temperature compensation strip 18. However, this temperature compensation strip 18 is not always required, particularly for a receiving tube using a small Braun tube.

There will now be described by reference to FIG. 4 the fitting of a shadow mask without using the temperature compensation strip 18. In this case, the elastic support strip 19 is made of the same material as the temperature compensation strip 18, and is only required to assume such a form as resembles a composite of the shapes of the elastic support strip 19 and temperature compensation strip 18 shown in FIG. 4. Of course, the elastic support strip 19 in such particular case can be freely varied in shape.

The advantages and objects of the present invention will be more fully understood in comparison with FIG. 5 representing the conventional cylindrical panel wherein the same parts as those of FIG. 1 are denoted by the same numerals. According to the prior art panel of FIG. 5, the support pins 24 are equally spaced from the corresponding free flat edges of the side plates of the cylindrical panel 10. The elastic support members 19 corresponding to the support pins 24 embedded in the shorter side plates of the cylindrical panel 10 fully face the outside of the shorter side plates 17 of the cylindrical frame member 15, making it extremely difficult to allow the shadow mask to be repeatedly fitted to, detached from and finally incorporated in the cylindrical panel 10. When there is fitted the elastic support strip 19, it is generally preferred from the standpoint of preparing a shadow mask that said support strip 19 be welded in advance to the temperature compensation strip 18 and then the welded members be again welded to the cylindrical frame member 15. However, where the support pins 24 are set, as described above, close to the cylindrical frame member 15, then the points at which the elastic support strip 19 is fixed to the temperature compensation strip 18 overlap the points at which the temperature compensation member 18 is fixed to the cylindrical frame member 15, resulting in not only difficulties in fixing said compensation member 18 to said frame member 15, but also failure to properly compensate the thermal deformation of the shadow mask as a whole. Accordingly, the elastic support strips 19 fitted to the shorter side plates of the cylindrical frame member 15 have heretofore had to assume a different shape from that of the support strips 19 provided on the longer side plates of said frame member 15. Moreover, the support pins 24 of the shorter side plates of the cylindrical panel are positioned close to the cylindrical frame member of the shadow mask. Where, therefore, the longer and shorter side plates 16 and 17 of the cylindrical frame member 15 are broadened. in width for reinforcement of the shadow mask as a whole, then the support pins 24 of the shorter side plates of the cylindrical panel 10 are inserted deep into the gap between the shorter side plates 17 of the cylindrical frame member 15 whose width has thus been broadened and the corresponding side plates of the cylindrical panel 10, presenting considerable difficulties in allowing the shadow mask to be repeatedly fitted to, detached from, and finally incorporated in the cylindrical panel. While the conventional cylindrical panel has the aforementioned drawbacks, the present invention provides a color television receiving tube free from such shortcomings.

The present invention may be practised in various other embodiments than described above. Throughout the following embodiments, the same parts are denoted by the same numerals. In the embodiment of FIG. 6, the vertical distance P between the support pins 24 of the longer side plates 12 of the cylindrical panel 10 and the inner edges 26 of the corresponding longer side plates 16 of the cylindrical frame member 15 is made larger than the vertical distance P between the support pins 24 of the shorter side plates 13 of the cylindrical panel 10 and the inner edges 26 of the corresponding shorter side plates 17 of the cylindrical frame member 15. If, in this case the support pins 24 having the distance P are placed too close to the free edges of the side plates of the cylindrical panel 10, then the free edges of the side plates of said panel 10 will possibly be subject to a stress caused by the embedding of said support pins 24, so that the support pins 24 of the longer side plates 12 of the cylindrical panel 10 should be positioned closer to the face plate 11 than the support pins 24 of the shorter side plates 13 ofsaid panel 10.

FIGS. 7 and 8 are plan views of a cylindrical panel according to other embodiments of the present invention, wherein there are embedded the support pins 24 in only the three adjacent ones of the longer and shorter side plates 12 and 13 of the cylindrical panel 10. In FIG. 7, the support pins 24 are provided in the two shorter side plates 13 and one longer side plate 12 of said panel 10, and the elastic support members 19 are fitted to those side plates of the cylindrical frame member 15 which face said support pins 24 without using a temperature compensation strip. In FIG. 8, the support pins 24 are disposed in the two longer side plates 12 and one shorter side plate 13 of said panel 10. The support pins 24 of FIGS. 7 and 8 assume the same relative position as those of FIGS. 1 and 2.

FIG. 9 presents still another embodiment of the present invention wherein only one of the four support pins 24 is simply pressed against the corresponding elastic support strip 19. The support pins 24 fixed in the two shorter side plates 13 and one longer side plate 12 of the cylindrical panle 10, as well as the corresponding elastic support strips 19 detachably engaging said pins 24 have the same construction as those of FIGS. 3 and 4, whereas the remaining support pin 24a attached to the other longer side plate 12a, as well as the corresponding elastic support member 19a are simply so designed as to be pressed against each other instead of being mutually engaged. Namely, said elastic support member 19a does not have the engaging hole 23 shown in FIG. 4. Since the shadow mask is sufficiently fixed in the cylindrical panel even by three of the support pins 24 excluding the aforementioned support pin 24a, there is no need for the support pin 24a and the corresponding elastic support member 19a to be mutually engaged. The four support pins of FIG. 7 have the same relative position as in FIG. 2. To achieve the object of the present invention, it is not always necessary to cause the shorter side plates 17 of the cylindrical frame member 15 to be outwardly curved.

As mentioned above, the present invention provides a color television receiving tube free from the drawbacks encountered with the prior art apparatus by allowing the mask to be fitted to and detached from the cylindrical panel in accurate alignment and with great ease. The present invention is applicable not only to a shadow mask type color television receiving tube, described in connection with the foregoing embodiments but also other types of such receiving tubes, for example, a slot mask type.

What we claim is:

1. A color television receiving tube comprising a rectangular cylindrical panel wherein a rectangular face plate is outwardly curved, said panel including two longer side plates and two shorter side plates projecting from the periphery of the face plate inwardly toward a funnel-shaped portion so as to be joined with a funnel-shaped opening with the free flat edges of all of said side plates disposed in the same plane and the inner wall of the face plate being coated with a fluorescent layer; a mask formed of a rectangular cylindrical frame including two longer sides and two shorter sides, of which at least the longer side plates are curved outwardly toward the face plate received in the cylindrical panel and a perforated member provided with a plurality of electron beam apertures and fixed to the cylindrical frame member at a prescribed space from the inner surface of the face plate; a plurality of support pins fixed in the inner wall of at least three of the adjacent projecting side plates of the cylindrical panel with the engaging end of the pin exposed; and a plurality of elastic support members elastically fitted to the side plates of the cylindrical frame member facing the corresponding support pins so as to be detachably engaged with said support pins, thereby maintaining the perforated member at a prescribed space from the inner wall of the face plate, wherein the support pins are positioned nearer. to the free flat edges of the side plates of the cylindrical panel arranged in the same plane as compared with those edges of the frame member which face said free flat edges, and the support pins embedded in the longer side plates of the cylindrical panel are more spaced from the plane defined by the free flat edges of all the side plates of the cylindrical panel than the pins fitted to the shorter side plates of said panel.

2. The color television receiving tube according to claim 1 wherein the support pins are embedded in all the four side plates of the cylindrical panel, all the four side plates of the cylindrical frame member are provided with the elastic support members corresponding to the support pins, and said elastic support members are perforated with a hole detachably engaging the corresponding support pin.

3. The color television receiving tube according to claim 1 wherein the support pins are embedded in three of the four side plates of the cylindrical panel, those of the side'plates of the cylindrical frame member which face said pins are provided with the elastic support members corresponding to said pins, and said elastic support members are perforated with a hole detachably engaging the corresponding support pin.

4. The color television receiving tube according to claim 1 wherein the support pins are embedded in all the four side plates of the cylindrical panel, the three adjacent side plates of the cylindrical frame member are provided with elastic support members detachably engaging said support pins and the remaining side plate of the cylindrical frame member is fitted elastic support strip, one end of which is fixed to the free end of said temperature compensation member.

6. The color television receiving tube according to claim I wherein the elastic support members assume the same form.

I i l l 

1. A color television receiving tube comprising a rectangular cylindrical panel wherein a rectangular face plate is outwardly curved, said panel including two longer side plates and two shorter side plates projecting from the periphery of the face plate inwardly toward a funnel-shaped portion so as to be joined with a funnel-shaped opening with the free flat edges of all of said side plates disposed in the same plane and the inner wall of the face plate being coated with a fluorescent layer; a mask formed of a rectangular cylindrical frame including two longer sides and two shorter sides, of which at least the longer side plates are curved outwardly toward the face plate received in the cylindrical panel and a perforated member provided with a plurality of electron beam apertures and fixed to the cylindrical frame member at a prescribed space from the inner surface of the face plate; a plurality of support pins fixed in the inner wall of at least three of the adjacent projecting side plates of the cylindrical panel with the engaging end of the pin exposed; and a plurality of elastic support members elastically fitted to the side plates of the cylindrical frame member facing the corresponding support pins so as to be detachably engaged with said support pins, thereby maintaining the perforated member at a prescribed space from the inner wall of the face plate, wherein the support pins are positioned nearer to the free flat edges of the side plates of the cylindrical panel arranged in the same plane as compared with those edges of the frame member which face said free flat edges, and the support pins embedded in the longer side plates of the cylindrical panel are more spaced from the plane defined by the free flat edges of all the side plates of the cylindrical panel than the pins fitted to the shorter side plates of said panel.
 2. The color television receiving tube according to claim 1 wherein the support pins are embedded in all the four side plates of the cylindrical panel, all the four side plates of the cylindrical frame member are provided with the elastic support members corresponding to the support pins, and said elastic support members are perforated with a hole detachably engaging the corresponding support pin.
 3. The color television receiving tube according to claim 1 wherein the support pins are embedded in three of the four side plates of the cylindrical panel, those of the side plates of the cylindrical frame member which face said pins are provided with the elastic support members corresponding to said pins, and said elastic support members are perforated with a hole detachably engaging the corresponding support pin.
 4. The color television receiving tube according to claim 1 wherein the support pins are embedded in all the four side plates of the cylindrical panel, the three adjacent side plates of the cylindrical frame member are provided with elastic support members detachably engaging said support pins and the remaining side plate of the cylindrical frame member is fitted with an elastic support member pressed against the top of the corresponding pin.
 5. The color television receiving tube according to claim 1 wherein the elastic support members each comprise of a temperature compensation strip fixed at one end to the corresponding side plate of the cylindrical frame member and an elastic support strip, one end of which is fixed to the free end of said temperature coMpensation member.
 6. The color television receiving tube according to claim 1 wherein the elastic support members assume the same form. 